Finally! We’ve been working on this ever since the LS7 crate engine was released, and now we have a full running package available for those people swapping this engine into kit cars, street rods, muscle cars, race cars, off-road vehicles, etc.

This setup will work on the LS2 and LS7 engines with the 58X reluctor wheel (gray crank sensor), and features our custom formed wiring harness available in any length you need for your project. The harness is designed for use with the factory 90mm ETC throttle body. Each harness/ECM package will come with the usual Speartech features including: fuse block, fuel pump relay, check engine light, OBD-2 diagnostic connector, and has easy to hook up wires for battery, ignition switch and electric fuel pump. Wires are also brought out and labeled for tach and speedometer use.

Our package makes use of the production GM ECM (E38) designed for this engine; no boat computers or expensive aftermarket race ECU’s. This setup allows the engine to run as designed and allows for normal GM diagnostics and data monitoring using a Tech 2 or any aftermarket scan tool capable of communicating with the newer GM engines. This is a full closed loop setup designed mainly for non-emissions use. Purge canister control and rear oxygen sensors can be optionally added for emissions compliance in many areas.

Like most of our wiring harnesses, these harnesses are custom made per individual application so there is no on the shelf boxed harness ready to ship.

Initial packages are available for manual transmission or non-electronic automatic applications, with the electronic automatics following close behind!

Thanks guys! Yes, it did feel good to finally fire up the engine and it just sat there and ran like it was supposed to!

The complete LS2/LS7 custom stand alone wiring harness and computer package is $1995.00. This package was specifically developed for the new 2006 LS2 crate engine (Part number 19156261) with the 58X crankshaft sensor.

The package includes the following:

A new custom length, stand-alone LS2/LS7 wiring harness. The harness includes a check engine light, diagnostic connector, fuel pump relay, fuse block, and labeled wires for easy hookup to the battery, ignition switch, and fuel pump. Wires are also included for tach, speed, and A/C functions where applicable. These custom stand alone harnesses are built for full function, closed loop control, and designed for non-emissions use (no post-cat O2's, purge canister, or fuel tank evap interface). Our harnesses can be built to your desired length specifications.

Hi John: The harness looks very good and is resonably priced. My question for you is if you are are running a non computer controlled trans such as a turbo 200R4 or 350 turbo is there a bracket setup, way to connect the TV or kick down cable to the elctronic Trottle Body Assembly? The trans will not work properly with out it. If you are running a turbo 400 can you just wire in the detent switch somehow to the electronic gas pedal assembly or would you have to modify this assembly some how? The L480 electronic trans might be better to run when you come out with a harness for it but it doesn't fit in a lot of swaps without cutting and modifying the trans tunnel. Thanks for coming out with a good product.

Hi John: Thanks for the info on the trans question. If you wanted to run a 200r4, 700R4 or 350 turbo trans you might be able to get an old style cable. One from a full size Buick or Olds late 70's vintage. These types of cables run from the trans to the gas pedal. You could connect the one end to the trans and run the other end thru the existing hole that was used for the old accelerator cable, you might have to open up the hole a little. You would have to make a bracket or weld a piece of rod to the pedal assembly rod and figure out the geometry. I think this would work fine because you have some adjustment in the cable. Maybe someone will experiment with this. I like the Electronic pedal setup because it is very easy to connect the cruise control. Good Luck to you I am sure you will sell a lot of the new harnesses.